Bumped version to 1.4.0
Bumped version to 1.4.0

ankon/Elasticsearch-Exporter,vtrifonov/Elasticsearch-Exporter,xeeo/Elasticsearch-Exporter,mallocator/Elasticsearch-Exporter,deseretbook/elasticsearch-exporter,ankon/Elasticsearch-Exporter,deseretbook/elasticsearch-exporter,vtrifonov/Elasticsearch-Exporter,xeeo/Elasticsearch-Exporter,mallocator/Elasticsearch-Exporter